let her rip

let (something) rip

1. To let something go; to start something up. Often used as an imperative. OK, the rocket is ready to launch. Let that thing rip! I replaced the spark plug, so go ahead and let it rip so we can see if there's any difference. We've spent so long working on this ad campaign that I'm excited to finally let it rip.
2. To do something without inhibition or restraint, typically with great enthusiasm or force. Wow, did you see that kick? He really let it rip. When I'm writing a first draft, I like to just let it rip and not worry about typos or grammar.
See also: let, rip

let her rip

1. To let it go; to start it up. Often used as an imperative. "Her" is used in the same way that some ships and machines are referred to as female. OK, the rocket is ready to launch. Let her rip! I replaced the spark plug, so go ahead and let her rip so we can see if there's any difference. We've spent so long working on this ad campaign that I'm excited to finally let her rip.
2. To do something without inhibition or restraint, typically with great enthusiasm or force. Wow, did you see that kick? He really let her rip. When I'm writing a first draft, I like to just let her rip and not worry about typos or grammar.
See also: let, rip

Let her rip!

 and Let it roll!
Inf. Let it go!; Let it start! Time to start. Let her rip! There's the signal! Let it roll!
See also: let

Let her rip!

and Let it roll!
exclam. Let it go!; Let it start! Time to start. Let her rip! Let’s go. Let it roll!
See also: let

let her rip

Allow an engine to go as fast as possible. An American colloquialism dating from the first half of the nineteenth century, this term presumably was first applied to locomotive or steamship engines. The American journalist Park Benjamin recorded it about 1840: “Another phrase, which often glides in music from the lip, is one of fine significance and beauty, ‘Let her rip!’”
See also: let, rip
References in classic literature ?
Wait is what I say; but when the time comes, why, let her rip!"
'darn please,' and 'cut your cable' is decidedly preferable to 'let her rip.' I once made a rule that I would have no slang in the house.
As for this thing, why, it has no nerves, no delicate joints nor tendons; it's a case of let her rip."
He should be beaten with a bat or put in a room with a vicious dog (maybe the puppy's mother) and let her rip him to shreds!
a I just let her rip and praise the Lord, it went far."
I know Paul O'Grady's put her to rest - apparently she's in a nunnery somewhere - but I'd let her rip me apart.
Turn off the hi-fi, open the windows and let her rip!
"Let her rip!" The local sheriff botched the job, however, and he was actually beheaded on the gibbet.
As he quartered away, I drew back my bow, settled my pin into the front shoulder and let her rip. My arrow found its mark to the buck's chest.
Had nobody the imagination to put Linehan in his alter-ego Mae McFettridge gear and let HER rip at the festival?